Elastic-fluid turbine.



G. W. DAKE. BLASTIG'FLUID TURBINE. APPLICATION FILED APB.23,1908.

903,454. Patented Nov. 10, 1908.

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A Ira/m5 K.

UNITED STATES PATENT OFFICE. v

OHARLES W. DARE, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THEBAKE-AMERICAN STEAM TURBINE UUMFANY, (IF GRAND RAPIDS, MICHIGAN.

Ensure-rum: runnmn.

Specification of Letters latent.

Patented Nov. 10, 1903.

To all whom it may concern:

Be it known that I, CHARLES \V. Dane, 11.

' citizen of the United States, residing at the city-of Grand Rapids,county of Kent, State of Michigan, have invented certain new and usefulImprovements in Elastic-Fluid Turbines, of which the following is aspecification. a

This invention relates to improvements in elastic fluid turbines.

The objects of my'invention are: first, to increase 'the efficiency-moielastic fluid turbines bv a more effective form of the buckets incombination with the nozzle; second, to lessen the cost of constructionboth in the economizing of material and in lessening the labor cost ofproduction; third, to provide a construction which is readily assembledand disassembled, and in which' injured parts can be quickly substitutedor repaired; and fourth, to improve the specific details of constructionof the bucket.

Further ob'ects will definitely appear from the detai ed description tofollow.

I accomplish the objects of; my invention by the devices and meansdescribed in thefollowing specification.

The invention is clearly defined and pointed out in the claims.

In the accompanying drawing I illustrate such parts of an elastic fluidturbine as are necessary to the ,pro er understanding of my invention,in whic Figure 1 is a sectional view transversely throu h the rim of aturbine, showing a detail of the rough blank in the first step of therooess of manufacturing the buckets of my improved turbine, the viewbein Y taken on a plane indicated by the section l-fines ZZ of Figs. 6and 7. Fig. '2 is a similar sectional view showing the-next step ofthe-method of manufacture in which the annular groove for the bucketshas been formed in the blank. Fig. 3 is a similar sectional vicw,showing the groove formed for receiving and seating the partition wallsbetween the buckets. Fig. 4 is a detail elevation view of one of thesaid partition walls or plates. Fig. 5 is a detail sectional viewsimilar to that appearing in Fi it. 2 and 3, except that the rim of thetur nor is laid on its side, showing the partition nulls in place in thelllll. Fig. (3 is a detail View of a portion of the rim of a turbine andnozzle in position, being a. side elc- .vation looking squarely at theside into the buckets. Fig. 7 is a. detail sectional view of thestructure as appearing in Fig. 6, taken or. a lane corres onding to thecurved line X--l of Fig. 6, coking in the direction of the little arrow.Fig. 8 shows a modified arrangement of the turbine wheel with thebuckets on the periphery in place of on the face; and Fig. .9 is a crosssection throughthe turbine nozzle 10.

In the drawing,. similar numerals of'reference refer to similar partsthroughout the several views.

Considering the numbered parts drawing, a bucket segment or ring 1 isformed in-the manner usual with my construction of elastic fluid turbineengine with a suitable shank with bolt hole therethrough for attachmentto the central disk nothere shown. In the face of this segment or ring,I cut a roove 2 which is in form one-half 'of an elipse, the ellipsebeing divided on the long axis. This broad groove 2 is read-- ily turnedoutafter the'turbine wheel has been assembled with the ring 1, either afull or segmental ring. After this has been done,

of the I cut grooves 4 transversely across the ann'ular bucket groove atan angle of about 20 degrees, by a suitable rotary cutter. The ellipseis of such form that when the cutter is set atan angle of 20 degrees itforms a true circle, so that the tool cuts an even groove out of theback wall. This tool, in cutting the metal, turns up a thin bur. Afterthe groove is'cut, I cut a notch 5, which is a continuation of thegroove 4 out through the edge of the outer portion of the ring toreceive a lug on the bucket partition wall.

The buckets are 'formed by inserting semicircular pieces of sheet metal7 with lugs 5 formed at: the upper outer angle within the groove 4. Whenthese se1nicirculardisks are punched from a sheet of metal, a. bin S israised around the edge of the some from the action of the punch, whichbur I :nn careful to preserve on this sheet metal partition wall. It isutilized in the proper securing of the said partition wall within thebucket groove 2. 'lhcsemi-circular partition wall7 is inserted in thegroove with the *kted down intothe' notch 5, whenthe partifirst I tamtheminsuitable slots.

' ring may be roughly formed to shape'an Y ,tion walls can then beinserted by the action ofa light tool, forming a comparatively indicatedin Figs. 5 and 6.

-' elastic fluid-most efl'ectively into the buckinet'al bucketpartitions, which are made proper strength onlybeingrequired.

'inserted' in transverse grooves bent .by'the rubbing action of a tool,somewhat like the spinning of metal, to engage the bur on thesemi-circular partition plateand this very eflectively retains the saidartition in place. The lug 5' is then rivt-ion wall is'efiectively andsafely held in place. When this is done, the turbine wheel isputintoallathe" and the partition walls turned oil to' make them even, anda broad notch' 7 is formed in the same towards the receiving end .of thebucket, the discharge end of the bucket being indicated at 6. The

osition of this bucket partition 7 is clearly A nozzle 10 with itsend'cut'oblique is arranged in this broad'notch 7 to deliver the ets, and,as this construction enables Very .thin partition-walls to be placedbetween the buckets, the bucket capacity of a turbine is correspondinglyincreased and the angle of the nozzle and the position which itoccupies, projecting into the notch, enables the elastic fluid to bethus delivered most eflect- The result is a very marked increaseefiicieny of the entire engine.

In Fig. 8,'I' have shown how thebuckets can be arranged on theperipherv-of a turbinewheel, in which event I refer to form lugs 5 onboth sides of'the ucket and re From this de scription it will-be seenthat the hue 'e turned true. The bucket groove'2. may then be formedtherein by the use of a heavy tool, cutting the metal very rapidly; .Thepartishallow groove to receive the thinflsheet from punchings. Thepnnohings should not be finished, because the buris utilized as apartof. the attaching means. This forms the buckets very economicallyand very ef fectively, andby then shaping the buckets with the broadnotchto receive theobIique-r ended no'zzle, the fullbucket capacity andthe most eifective delivery of elastic fluidis secured. Aside'fronieconomy in construc: tion, greater efliciency in the elastic fluidturbine is thus secured. The partitions 7 can bereadily withdrawn andrepaired or new ones -in serted,'a tool of Having thus des ibed myinvention, what I claim as ne'wan desire to secure by Let-' ters Patentis: v v

- 1*. In an elastic fiuidturbine, the combination of the turbine wheel,wi h' a -bjucket ring with an annular groove to 10d therein ofsemi-elliptical cross section on the long axis; seirsi c irc iar restmetal basket rtitiens in tlie'bucket into a notch inthe .w purposespecified.

groove and set at .an angle theret f Said" sheet metal partitionshaving-a bur formed on their edgbe and being retained by coinpressing"the ur on the edge of the said transv rse groove against the same, thesaidpar tit" ts having a lug extending to one side and riveted'into asuitable notch, t e said 'bucket-s'partitions having a broad not" h 7 intheir nee edges; and a nozzle with its. end

cut oil obliquely ,to', conform to the said notch, coactingsubstantially as described and for the purpose 5 ecified.

2. In anelastlc flui 'turbine,'thecombination of the turbine wheel, with'a bucket' -ring with an annular bucket groove formed;

thereinsemi-elli tical in cross section on the long. axis 0 the ellipse;substantially semi-circular sheet metal bucket partitions inser ed at anangle in the'said bucket" groove and ret-ainedthere by suitable means,

a broad notch being formed inthe free ed e of the'sai'd' partitions; anda suitable nozzle with its end cut off oblique to; conform 'to the saidnotclrin said .partition's, coacting substantially: asdescribed and forthe 'fpurpose specified.

3.111 an elastic turbine, the'combina -i tion of the turbine-wheel witha bucket ring with an annular buck t groove formed theret'ransverse'to'the said-bucket groove in a suitable notch'in the, wall thereof; aburformed on the said sheet metal a-rtition, enagedbyva bur on the ed e0 ,the groove, eing compressed against t e same, coac'ting 4; .In anelastic fluid turbide the combination 'of'theturbine wheel with abucket, ring with an annular bucket groove formed there in; a sheetmetal bucket partition arranged transverse to the said .bucket. groovein a suitable 'notc ,formed on the said sheet metal aged by a bur on theedge 0 ei'ng compressed a ainst thesame, an expartition, en-

tension .or lug of t e said partition beingriveted, into a notchnin thewheel, coacting forthe purpose specified. 5. In an elastic fluid turbne, the combination of the turbine wheel with a bu'cket'ring I I with anannular bucket groove formed: there I ingja sheetinetal bucket-partitionarranged.

the groove, I

in; a sheet metalibuc et partition'arranged in a the wall thereof; a burtransverse to the said Y bucketzgroove a' suitable notch in the wallthereof, an extension or lug of the said artition beingrriveted Inwitness whereof, I my hand and seal inlthe presef ceuo witnesses, p a;

CHARLES BAKE. -[i..s'.]

Witnesses: r

wa s. a Jngr NI; rm-swearin eel, coaeting for the

